Most people think surges only occur during violent lighting storms. In fact, a surge in power supply can take place any hour of the day or night, under any weather conditions. These surges are designed to protect your equipment powered through the device from spikes in voltage above a safe threshold. Over time, however, surge protectors lose their ability to protect and should be replaced. This basic 6 outlet surge protects general household appliances and home entertainment electronics. It is great for TVs without satellite or cable, DVDs, VCRs, and portable audio devices.